williams



Aug. 28, 1928.

J. W. WILLIAMS HUFFLEGR Filed Nov. 1, 1927 3 Sheets-Sheet gmmtoz Au 2a, 1923.

J. W. WILLIAMS MUFFLE R Filed Nov. 1, 1927 3 Sheets-Sheet 2 gmentom Snow/ s Aug 28, 1928.

J. W. WILLIAMS MUFFLER Filed Nov 1, 192'? 3 Sheets-Sheet 3 Patented Aug. 28,1928. I 5

UNITED STATES: PA -am OFFICE.

JOHN WARD 01' 3mm, 1mm YORK.

Application meaaovember 1, 1922. Serial Io. amass.

This invention relates to a mufiler which is tively with cylindrical necks 13, 14 which more particularlyv intended for deadening form an inlet, and an outlet respectively, for 55 or reducing the noise of the exhaust gases rethe exhaust gases of the engine which are to sulting from the explosion of charges of combe mufiied so as to render them noiseless as IS bustible fuel in gas engines, but the same is they escape from the engine. The opposing also useful for deadening or reducing the large ends of these conical sections which noise of other expanding fluids such as the form the casing of the muflier can be conexhaust steam from a steam engine. nected with each other in any suitable manner It is the purpose of this invention to pro-. but preferably by. means of an annular- IU vide a mufller which is comparativelysimple I seamed joint consisting of a laterally project-' and inexpensive in construction and not lia-' ing peripheral flange 'formed on the lar e ble to get'out of order, which will efliciently end of the outlet section 12 and aninwarrfiy 6 muffle exhaust gases or the like without proopening hook 16 arranged on the large end of ducing any undue back pressure and which the inlet section 11 of the casing and receives 15 is so constructed that the same is not likely a. flange 15 of the outlet section 12, as shown to gather any considerable amount 50f soot, in- Fig. 1. a and whatever soot may-accumulate can be The space within the concaveiside of the readily and easily removed from themufiler hook 16 is larger than necessary to receive. when required. I V j y the flange 15 so as to form an inwardly open- In the accomPanyingdrawingsz-jing channel or groove 17 between the flange Figure 1 is a longitudinal section of one 15 and the base of the hook 16 for a purpose form of muflier embodying my invention. which will resently appear. i

Figure 2isacross-section of the same taken Within a or shell of the mufiier on e2-2 Fig. 1.. is arranged a transverse baflle, partition or igure 3 is a perspective view of one secwall which divides the interior of the casing tion of the bafile or partition which is armto an inlet chamber 18 and an outlet chamranged within the casinilpf the muflier. ber and th 11 1 is P v i h 011601 Figure 4 is a longitu al section showing more labyrinth passiges which place the inlet another form of muflier constructed-in acand outlet chambers of the casing in comcordance with my improvements. mumcation with each other so that the ex- Fi re 5 is a cross-section of the same taken haust gases instead of passing directly fro m on t e correspondingly numbered line the inlet to the outlet chambeniare compelled Fi 4. 'to take a tortuous course andthereby cause Figure 6 is a per ective view of one secthe speed of the exhaust gases to be retarded tion or plate of theba eor partitionarranged slightly and at the same time silencing or withiin the casing of the mufiier shown in Figs. muifling the noise which is produced :3; the 4: an 5. 1

Figure? is another modified formof my om the engine. invention. .In'the preferred construction this bafie 4o Fi re 8 is a cross section taken on line comprises two sheet metalplates or 8-8 ig.7. 21, preferably of iron which'are arrange Similar characters of reference indicate with their innerflatsides engaging each other like parts in the several figures of the drawwhile their peripheral-or edge portions are I seated in the channel 17 formed within the in s. i a .45 Referring to the construction shown in seamed joint between the front and, rear Figs. 1,2, and 3 the numeral 10 represents sections of the muflier casing so that this generallythe enclosing casing; shell or body seamed joint not only connects the front and of the muflie'r which is preferably iron; This rear sections of the muiiier casing but also se- 7 casing preferably consists of two sections 11, cures the plates of thebafile against each 50 12 each of which has the form of a cone frusother and holds the same in the groper'posia tram, the lar e ends of these cones being artion within the to format e mle't' and ranged o posite each other and the small outlet chambers therenn c ends of t ese cones being provided respec- Those partsof the lates20' and 210i the ses'as. they eseapein the form of e aust 90 batlle are so constructed that they form a tortuous path or ases' from the inlet to the outlet chamben,

passage for the exhaust n the preferred construction each of these plates is provided witha plurality of later-' ally offset hollow beads 22 each of which is formed by cutting a pair of slits at a suitable distance a art in the respective plate and then bending .or bulging the intermediate .portion of the plate outwardly so that each of these beads forms a channel .23 on its inner side which is open' at its opposite ends,

- as shownat 24 whereby this channel-comof a bead on the other plate of the baflle.

In the preferred-construction each of the baflie plates is provided with three off-set or bulging beads which are-arranged parallel with each other and the beads of one baflie plate are arranged at right angles to the beads i of the other baflie plate, as shown in Fi s. 1

and 2,whereby the intermediate art of the. concave side of 'each'bead ofone afile platecommunicateswith the concave sides of the beads of the'other baflle plate between opposite ends thereof.

A plurality of tortuous or labyrinth pas sages are-thus formed in the battle through which the exhaust gases pass while moving. from the inlet to-the outlet chamber of the casing, thereby insuring elimination of-the noise of the ases to a maximum extent. The, formation 0 these tortuous passages is howeversuch that there is a tendency w for the deposit of any soot of the gases inthese 0 r 1 s and any soot which ultimately is deposite I within these passages can bevery easily removed therefrom and thereby en b 'able the mufllertobe always maintained in the maximum state of efliciency.

In the o ration-of the mufller the gases pass from t e inlet chamber into the opposite eln'ninatin ends'of thebaflle channels of the respective baflle late; thence from the inner parts of 1 these 0 annels to the inner parts of the channels of the other baflle plate and thence laterally outward from the endsof the channels in the last-mentioned plate into the outlet chamber,- thereby cutting down if notcwholly any noisy effect as the exhaust fin escape from the mufller through e outlet ereo I i Instead of making sections of the casing of I conical form, as shown in Fig..1,-these sections may be made of hemis herical form, as shown at. 25, 26 in Fi 4, an inlet and outlet collars 27 and 28 0f t ese chambers may also be made separate from the walls of these chambers and secured thereto by crimping,

- products" of combustion tion as shown at 29 and 30 in Fi 4, instead of ledge capacit made integrally with t e walls of the mg a channel on its concave side which communicates at its opposite ends with one of the chambers of the casing, while the intermediate or central part of this channel com-v municates with the central part of a corresponding channel arranged at right angles to the first-mentioned head on the other baflle plate, as shown in'Figs. 4, 5, 6.

Both forms of mufllers shown in the drawings and embodying myinvention can be produced at comparatively low cost owingto the simplicity. of the construction and the ease with which the several arts can be assembled. Moreover thism pact in construction and therefore especially suited for, installation where a imited amount of space is available fora device of this character.

If desired my improved mufllermay be organized with a lurality of baflles or partitions which cm which are mounted in a series within the casing as shown in Figs. 7 and 8 so that the ass successively through the same. In this farm of my invenree baflles are shown and the central .one has its plates 20, 20 secured together and held in the casing by engaging the periphery or edge pgrtions of these plates in a channel formed tween the cooperatin flange 15 and hook 16 of the seam joint etween the two casing sections 31, 32 having the inlet 113' I 114 for the exhaust gases toand the outlet silenced. The plates 120 and 220 of the front and rear baflles which are arran ed in front and in rear of the central baflle ave their edge portions turned to form pairs of peripheral flanges, as shown at 33, 34, the flanged part of the plates of the front baflle en gin with an mwardly facing annular s oul er. 35 formed on the interior of the front cas' section and the flanged part of the plates h the rear baflle engaging with an inwardly facing annular shoulder 36 formed on the interior of the rear casing section. The flanges er is very com-- dy my invention and of the front and rear baflles may be connected with the adjacent part of the casing by electric welding or" any other suitable manner.

When a plurality of 'baflles is used the same 7 are spaced apart lengthwise of the casing so as to form intermediate compartments or chambers 37, 38 which serve 'to connect the tortuous transfer passa es in onebaflle with" those of another and t ereby lengthen the zig-zag coursethrough which the exhaust gas must pass before escaping to the atmosphere and increasing the silenclng effect on the as accordingly, without perceptibly increasing the back pressure on the out-going gases.

I claim as my invention 1. A mufller comprising a casing having an inlet and an outlet for the exhaust, and a bafile arranged within said casing between said inlet and outlet including two transverse plates having flat sides opposin each other and edges mounted on the wall 0 said casing and formin inl t and outlet chambers therein, and eacl i of said plates being provided with a laterally projecting hollow bead. the bead of one plate being arranged at an angle relative to the bead of the other plate, and

each bead opening at one end into one of said chambers and communicating between its ends with the other chamber.

2. A mufller comprising a casing having an inlet and an outlet for the exhaust, and a baflle arranged transversely in the casing and dividing the same into an inlet chamber and an outlet chamber and consisting of two plates which have flat sides engaging each other and each of hollow beads which are arranged at an angle to the beads of the other plate and each of said beads opening at its opposite ends into oneof said chambers and having its concave side communicating between the ends thereof with the concave sides of the beads of the other late.

3. 'mufiler comprising a casing having an inlet and an outlet for the exhaust, and a' baffle arranged transversely in the casing and. dividing the same into .an inlet'chamber which has a pluralityof and an outlet chamber and consisting of two plates which have flat sides eng ing each otherand each of which has a ho low bead formed thereon by laterally deflecting a part of. the plate so that the opposite ends of the bead open into one of the chambers, andthe beads of both plates being arranged at an an gle relative to each other so that the concave sides of the beads of both plates communicate with each other between the ends thereof. a

In testimony whereof I hereby aflix my signature.

. JOHN WARD WILLIAMS. 

